Can someone please sovle these for me! Thank you and for helping me out!!!

3. 13m - 22 = 9m - 6
4. 19c + 26 = 41 + 14c
5. 15 - 4x = 42 - 7x
6. 14 + 5y = 50 - 4y
7. 18w - 2 = 10w + 14
8. (negative)5a + 6 = 6a - 38

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

For what is the measure of the angle at the top of the shed? a. multiplication of areas b. squaring of areas c. addition of areas d. division of areas

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?